>> i knew it was something serious, not just fireworks. it was an explosion because of the shaking and everything, but i told the kids get on the ground and then i called 911. >> the roar of the pipe bomb explosion left residents numb. >> my right ear was towards the window and it deafened it for a while, then after about an hour the ringing started. >> witnesses saw a red s-u-v flee the area after the eruption. police found the vehicle at college park high not too long after. the second bomb was in the trunk, and 3 teens were >> this was a significant pipe bomb, so all the damage you'd expect, the mailbox was completely destroyed and anyone near it would've certainly been injured. >> the corporal says those bombs were so strong, they could've killed someone if they were standing close enough. and although the 2nd one was found here at the school, they don't believe the school was a target --- only a meeting place. in pleasant hill alecia reid kron 4 news.